What is the surface area of the square pyramid represented by the net?

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there is not answer choices btw...

Kelly is a salesperson at a shoe store, where she must sell a pre-set number of pairs of shoes each month. at the end of each work day the number of pairs of shoes that she has left to sell that month is given by the equation s=300-15x , where s is the number of pair of shoes kelly still needs to sell and x is the number of days she has worked that month. what is the meaning of the number 300 in this equation

Is the point (0, 8) on the x-axis or y-axis? how do you know?

With number 11 ( show how you got the answer)